Metso Paper Inc.

Valmet Technologies, Inc.

Markku Partanen

Kati Lindroos

Jorma Halla

Kauko Vänni

Håkan Sjöström

Olli Tuovinen

Petteri Vuorio

Matti Kaarineva

Tomi Iisakkila

Marko Loijas

Juha-Pekka Huhtanen

Vesa Harju

A blade segment () for a refiner comprises an inner end edge () and an outer end edge () and a first side edge () and a second side edge () opposite to the first side edge (), the first side edge () and the second side edge () extending between the inner end edge () and the outer end edge (), and a refining surface () comprising blade bars () and blade grooves () therebetween on a front surface () of the blade segment (). At least one side edge () of the blade segment () comprises at least one opening () that extends from the side edge () toward the opposite side edge ().

Blade segment for refiner

A refiner () for refining fibrous material. And a blade element () for a refiner () intended for refining fibrous material. The blade element () having a refining surface ('), which has blade bars () and blade grooves () between them. The top surface of at least one blade bar () is provided with refining grits (). The blade element () has portions () forming a protruding part extending away above the refining surface () and above the blade bars () or the refining grits () on the refining surface.

Blade element and refiner

A refiner () for refining fibrous material has a first refining surface () and a second refining surface (), arranged at least partly substantially opposite to form a refiner chamber () to which material to be defibrated is arranged to be fed. The first or second refining surface is arranged to move in relation to the opposite refining surface. The first refining surface has elongated openings () through which fibrous material to be refined is arranged to be fed into the refiner chamber, and/or the second refining surface has elongated openings () through which fibrous material refined in the refiner chamber is arranged to be discharged. The elongated openings provided through the refining surface are arranged at an angle transverse to the blade bars and blade grooves of the refining surface on the first and/or second refining surface.

Refiner and method for refining fibrous material

A refiner () for refining fibrous material has at least one first refining surface () and at least one second refining surface (), which are arranged at least partly substantially opposite to one another in such a manner that a refiner chamber () is formed between them, to which the material to be defibrated is arranged to be fed. The first refining surface or the second refining surface has openings formed through them and through which fibrous material to be refined can be fed into the refiner chamber or through which refined fibrous material can be removed from the refiner chamber. In addition, a method for refining fibrous material, a refining surface of a refiner and a blade segment for a refiner.

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Valkeakoski, Finland

Markku Partanen